it is necessary for the operator to fully understand the relationship between the temperature in the drying room and the tinplate surface temperature during production to ensure that the coating on the tinplate storage tin cans surface can be cured at the required temperature and time to obtain a high-quality coating on packaging tin cans.
In general, the temperature of the baking room and the temperature of the tinplate differ by 20 ° C. The temperature difference is closely related to the heat capacity of the drying room, the specifications of the tinplate, and the coating speed. It is necessary to measure according to the actual situation. The commonly used test method is to choose 5 fixed points on the tinplate of packaging tin cans surface, attach a temperature measuring paper on it, and then pass the tinplate sheet with the temperature measuring paper through a hot drying room. The maximum temperature difference of the 5 test points is required to be Within 10 ℃. The temperature and heat distribution of the drying room can be judged from the temperature measurement paper to understand whether the coating on tin can package is heated uniformly.
